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The Block Bar module is a block module that acts as a container for other Drupal blocks. The module builds an Outlook style collapsible menu bar from the child blocks with each child block representing one panel within the bar. Multiple BlockBars can be created. Each BlockBar can be set with "sticky panels" which will remember the panel's open/close state between page refreshes. Also, an option can be set that will only allow one panel to be open at a time for a given bar. Block Bars and Block Bar panels can be themed globally or individually.